Arm for milling-machines.



J. GOETZ.

ARM FOR MILLING MACHINES.

APPLICATION FILED MAR. 13. 1914.

1,153,618, Patented Sept. 14, 1915.

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JOHN GOETZ, OF WEST ALLIS, WISCONSIN, ASSIGNOR TO THE KEMPSMITI-I MANUFAC- TUBING (30., 01E MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ARM FOR MILLING-MACHINES.

Specification of Letters Patent.

Patented Sept. 14, 1915.

Application filed March 13, 1914; Serial No. 824,367.

To all whom it may concern:

Be it known that I, J onN Gon'rz, a citizen of the United States, and resident of West Allis, in the county of Milwaukee and State of lVisconsin, have invented new-and useful Improvements in Arms for Milling-Machines, of which the following isa description, reference being'had tothe accompanyordinary overhanging arms which are round in cross section to such alinement of the arbor support with thespindlein the various adjustments of the arbor support.

With the above and other objects in view the invention consists in the 3 milling machine arm as herein claimed. 7

Referring to the accompanying drawings in which like characters of reference indicate the same parts in the different views,

Figure 1 is a side elevation of a portion of fied formof the invention as adapted to milling machines in present use; Fig. 5 is an end View thereof with the arm section on the plane of line 5 -5- of Fig. 4;, and, Fig. 6

is a detail view of one of the wedge pins.

In these drawings 10 indicates the milling "machineframe and 11 is the overhanging arm which islongitudinally adjustable in the frame as usual. This arm 11 is circular in cross section except for a flat surface 12 formed therein from end to end. At the rear end ofthe arm bearing in the frame the arm is clampedin the usual manner by means of a bolt 13 passing through a split portion of the hearing, but at the front portion of the bearing, instead of splitting it and providing a clamping bolt 13 as usual, it is left without being split and is provided with a transverse opening at its upper part forming a seat for a wedge pin 14. The wedge pin is of a cylindrical shape except for a flat surface 15 which is in a plane oblique to the axis of the pin so that the flat surface forms a cam surface or an incl ined wedging surface to fit against the fiat surface 12 of the arm. At each end of the wedge pin 14 is a projecting threaded stud 16 on which a nut 17 is threaded to bear against a washer 18 fitting against the flat sides of the arm bearing of the frame. 1 By t ghtening one nut, with the other loosened, the wedge pin la is drawn in a direction to more tightly wedge itself against the fiat surface 12 of the overhanging arm, while by loosening that nut and tightening the other the wedge pin is drawn in the opposite direction so as to release the arm and permit of its adjustment. In any adjustment. of the arm the fiat surface thereof remains at the same angle to the horizontal because of the fit of the flat surface of the wedge pin against the flat, surface of the arm.

An arbor support 19 is mounted on the arm I]; without having its collar portion split as usual, and is held at any desired dis? tance' from the frame by means of a wedge pin 14: identical with theuwedge pin 14 on the frame. Thus, the angularity of the .fiatv surface 12 of the arm with relation to the horizontal is fixed by means of the wedgev pin 14 and the angularity of the arher support 19 with relation to the flat surface 12 of the arm is fixed by the wedge pin 14:, notwithstanding the adjustment of either the arm in the frame or of the ararbor arm.

In the modification of. the invention shown. in Figs. 4 and 5 the invention is designed to adapt the ordinary overhanging arms of circular cross section ofmilling machines in present use to the guiding action for preserving the alinement of the arbor bearing. in the arbor support with the axis of the spindle as in the construction above described. The frame 10 having been originally designed for clamping the overhanging arm by means of the bolt 13 in front as well as at the rear, such frame is not suitable for receiving the wedge pin 14 direct,

but a supplemental frame plate 21 is secured to the front of the frame by means of to assure the alinement of the arbor bearing three bolts 22, and such supplemental frame carries a bearing 23 at its upper end for the overhanging arm 11' which latteris milled from its origmal, truly circular cross sec-"' tlon'so as to contalnthe flat surface 12 from' one end to the other, as in the construction abovedescribed. The arbor support 19 is employed as before with its wedge pin 14: fitting upon the fiat surface 12 of the arm 20 with the axis of the spindle. In order thatv the supplemental frame plate 21 may always be spotted in the same position,

after being removed for any purpose, it 1s preferably provided with a dowel pin 24 fitting in an opening bored in the frame to 'recelve 1t when the parts are originally adjusted in place.

By means of this invention the overhanging arm substantially circular in cross section, except for the fiat surface to be engaged by the wedge pin, is capable of maintaining accurate alinement of the arborbearmg of the arbor support with the spindle axis, notwithstanding the adjustments of the armor the arbor support, thus combining the'aclvantage of comparatively inexpensive construction of the overhanging arm circular in cross section with the advantage of accuracy of alinement of the arbor bearing of the arbor support in different adjustments possessed by overhanging arms angular in cross section.

- What I claim as new .and desire to'secure its axis and fitting against the fiat surface of the arm to hold it in position, and an arbor support carried by the arm.

2. In a milling machine, a frame, a. cylindrical arm adjustably fitting on the frame and having a fiat surface of uniform depth extending lengthwise thereof, a cylindrical pin fitting in the frame and crossing .the

arm, said pin having a fiat surface oblique to the axis thereof, the flat surface of the pin fitting against the flat surface of the arm, means for moving the pin longitudinally into clamping engagement with the arm, and an arbor support carried by the arm.

, 3. In a milling machine, a frame having an-arm bearing, a cylindrical arm slidably mountedin the arm bearing and having a flat surface extending lengthwise thereof and of uniform depth, a cylindrical pin slidably mounted in the frame in an opening intercepting the opening in which the arm is fitted and having a longitudinal fiat surface oblique to'the axis thereof, the flat surface of the pin engaging the fiat surface of the arm, screw studs at the ends of the pin,

nuts threaded on the screw studs and en-; gaging the opposite'sides of the frame for movingthe wedge pin longitudinallyinto and out of clampingengagement with the;

arm, and an arbor support carriedby the arm.

j a. In a milling machine, a frame, a, cylindrical adjustable arm fitting in the frame and having a fiat surfaceof uniform depth extending lengthwise thereof, a cylindrical pin slidably mounted in the frame and provided with a longitudinal flat surface at an angle to its axis to engage the fiat surface of the arm and clamp the arm in place, and an 'arbor support slidably mounted on the arm and having a similar pin connection therewith.

5. In a milling machine, a frame, a cylin drical arm adjustably fittingin the frame,

and provided with a flat surface extending lengthwise thereof and of uniform depth,a. cylindrical pin fitting 1 in the frame and crossing the arm witha longitudinal fiat surface at an angle to its axis and fitting against the fiat surface oflthe arm, means for moving the pin longitudinally to -clamp the arm in place, and an arbor support slidablymounted on the arm and having a 7 similar pin connection therewith.

6. In 'a milling machine .having ani arm "10o bearing, a cylindrical arm slidably mounted" in the arm bearing and having a flat surface extending lengthwise thereof and of uniform depth, a cylindrical pinslidably mounted in the frame and having a longitudinal fiat surface at an angle to its axis fitting against the flat surface of thearm,

screw studs at the ends of the pin, nuts threaded on the screw studs'andengaging the opposite sides of the arm bearing of the framefor moving thewedge pin longitudinally to clamp the arm in'position andan arbor support slidably mounted on the arm andhaving a similar pin connection therea a 11s with. h

7 The combinationwith a milling machine frame having 'anarm bearing, of a supplemental frame plate secured thereto and also provided with an arm bearing, an arm circular in cross section, except fora fiat surface extending longitudinallythereof; and fitting within the armibearingsof the bearing of the'supplemental frameplate and being cylindrical, except for an oblique, flat surface extending longitudinally thereof, the

flat surface of the wedge pin engaging-the flat surface of the arm, means for moving the wedge pin longitudinally to clamp'the *frame and the supplementalframe plate, a f wedge pin slidably fitting'throu'gh the arm j arm in position, and an arbor support carfiat surface of the Wedge pin engaging the fiat surface of the arm, means for moving the Wedge pin longitudinally to clamp the arm in position, and an arbor support slidably mounted on the arm and having a similar Wedge pin connection therewith.

9. In a milling machine, a frame member, a cylindrical, adjustable arm fitting in the frame member and having a flat surface of uniform depth extending lengthwise thereof, an arbor support member slidably mounted on the arm, and a cylindrical pin slidably mounted in one of the said members and provided with a longitudinal flat surface at an angle to its axis to engage the fiat surface of the arm to clamp said member and arm together.

10. In a milling machine, a frame member, a cylindrical arm adjustably fitting in the frame member and provided With a flat surface extending lengthwise thereof and of uniform depth, an arbor support member slidably mounted on the arm, a cylindrical pin fitting in one of the said members and crossing the arm With a longitudinal flat surface at an angle to its axis and fitting against the flat surface of the arm, and means for moving the pin longitudinally to clamp the said member and the arm together.

In testimony whereof, I aflix my signature, in presence of two Witnesses.

JOHN GOETZ. Witnesses R. S. C. CALDWELL, KATHERINE HOLT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 6. 

